logProgram.py

import time, datetime

while True:
    log = input()
    if log != 'Exit' and log != 'exit' and log != 'Quit' and log != 'quit':
        ts = time.time()
        st = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')

        file = open('C:\log.txt', 'a')
        file.write(st + ': ' + log + '\n')
        file.close()
    else:
        break